Document mbstring.regex_retry_limit and mbstring.regex_stack_limit directives

Closes phpGH-1865.

Author: kevincupp

appendices/migration82/other-changes.xml

@@ -252,8 +252,8 @@
     <member><link linkend="ini.ldap.max_links">ldap.max_links</link></member>
     <member><link linkend="ini.max-input-nesting-level">max_input_nesting_level</link></member>
     <member><link linkend="ini.max-input-vars">max_input_vars</link></member>
-    <member>mbstring.regex_retry_limit</member>
-    <member>mbstring.regex_stack_limit</member>
+    <member><link linkend="ini.mbstring.regex-retry-limit">mbstring.regex_retry_limit</link></member>
+    <member><link linkend="ini.mbstring.regex-stack-limit">mbstring.regex_stack_limit</link></member>
     <member><link linkend="ini.mysqli.allow-local-infile">mysqli.allow_local_infile</link></member>
     <member><link linkend="ini.mysqli.allow-persistent">mysqli.allow_persistent</link></member>
     <member><link linkend="ini.mysqli.default-port">mysqli.default_port</link></member>

reference/mbstring/ini.xml

@@ -78,6 +78,18 @@
       <entry>PHP_INI_ALL</entry>
       <entry></entry>
      </row>
+     <row>
+      <entry><link linkend="ini.mbstring.regex-retry-limit">mbstring.regex_retry_limit</link></entry>
+      <entry>"1000000"</entry>
+      <entry>PHP_INI_ALL</entry>
+      <entry>Available as of PHP 7.4.0.</entry>
+     </row>
+     <row>
+      <entry><link linkend="ini.mbstring.regex-stack-limit">mbstring.regex_stack_limit</link></entry>
+      <entry>"100000"</entry>
+      <entry>PHP_INI_ALL</entry>
+      <entry>Available as of PHP 7.3.5.</entry>
+     </row>
     </tbody>
    </tgroup>
   </table>
@@ -235,6 +247,32 @@
      </para>
     </listitem>
    </varlistentry>
+   <varlistentry xml:id="ini.mbstring.regex-retry-limit">
+    <term>
+     <parameter>mbstring.regex_retry_limit</parameter>
+     <type>int</type>
+    </term>
+    <listitem>
+     <para>
+      Limits the amount of backtracking that may be performed during one mbregex
+      match.
+     </para>
+     <para>
+      This setting only takes effect when linking against oniguruma >= 6.8.0.
+     </para>
+    </listitem>
+   </varlistentry>
+   <varlistentry xml:id="ini.mbstring.regex-stack-limit">
+    <term>
+     <parameter>mbstring.regex_stack_limit</parameter>
+     <type>int</type>
+    </term>
+    <listitem>
+     <para>
+      Limits the stack depth of mbstring regular expressions.
+     </para>
+    </listitem>
+   </varlistentry>
   </variablelist>
  </para>